Db grasse fowler and thaddeus fowler



UNITED sTATEs PATENT oEEIoE.

AS SIGNORS TO THEMSELVES, SAMUEL PLACE.

Specification of Letters Patent No.

To all whom it may concern: Be it known that we, DE GRASSE FowLE and THADDEUs FowLER, of North Branford, in the county of New Haven and State of Connecticut, have invented and made a certain new and useful Improvement in Coated Iron Pins; and we do hereby declare that the following is a full, clear, and exact description of the nature and operation of our said improvement, reference being had to the annexed drawings, making part of this specification, wherein-- Figure l, is a plan of our machine for finishing' the pins, Fig. 2, is an elevation of thc same, Fig'. 3, is a vertical section at the line ai, (a, Fig. 2, and Fig. 4, is a plan of a slight variation in the burnishing device.

Similar marks of reference indicate the same parts.

Pins have heretofore been formed of iron lby the ordinary cutting heading and pointing machinery, and have afterward been coated by boiling in tin similar to the brass pins, but the coating put on is so thin that the iron is liable to discolor and rust. lhen a thicker coating of tin is put on the pins by dipping the pins, or by any ordinary process for depositing suoli coating metal on the pins, they become very rough on their surface so that they will not pass into or through any fabric with ease, because such coating metal exists on the surface in minute granules: If the pins after being thus coated are subjected to any of the known polishing operations, such as the revolving or shaking box, the inequalities of surface are not removed, and considerable power is required to stick the pin in the fabric, as well as giving an unpleasant sensation to the hand.

Our invention does not relate to any particular mode of coating the iron pins, but our said invention does consist in finishing such coated iron pins by a rolling and compressing operation whereby the granules r are crushed down to a perfect level and the pin rendered smooth and uniform throughout its entire length. To accomplish this operation we make use of a wheel e, mounted on a shaft c, that is sustained on a frame o, and rotated by the fly wheel d or otherwise.

f is the conductor onto which the pins are placed and pass down the curved end of the conductor and lie horizontally as seen in Fig. 3. From the conductor the pins are separated one at a time by the slide g that MAKING COATED IRON PINS.

26,874, dated January 17', 1860.

is moved by the lever z., which is acted on by the p ins z', z', at the back of the wheel e.

7c, 1s a spring to keep the lever It, toward the pins z'.

Z, is a slide acting on the lever m, that is set on the fulcrum l, and formed with a chisel shaped separator 2.

6, is a spring acting against the end of lever m. The operation of this is, that the slide g presses a pin along from beneath the end of the conductor to be acted on as hereafter described, at which moment the separator 2 is drawn back and the line of pins rests on the slide g, now as the slide g draws back the separator 2, passes above the lowest pin sustaining the others above, while this lowest pin falls on the wheel e, as slide g, draws from under it. A

n, is a spring compressing plate coinciding near its end with the shape of the edge of the wheel e.

7 is a screw by which the spring compressing plate is kept toward e, with more or less power. The end of this plate n, is slightly beveled so that each pin is pressed in between the wheel e, and plate u. The revolution of the wheel e, rolls the pin around and both surfaces being very smooth bring down, by a. rolling compression, all the inequalities and roughnesses consequent on the tinning operation, and produces a perfectly smooth and highly finished pin; and the linished pin passes away from beneath the plate n, before another is entered so that any slight inequality in size will not affect the perfect operation and uniformity of pressure on the pin. To nish up the point we make use of the vibrating polisher o, kept onto the point by the spring p, and vibrated by the joint operation of the spring 3, and a series of teeth 5, around the back of the wheel e, acting on a stud 4, from the slide o. When desired this vibrating plate 0, may extend in the form of burnishing fingers 7, see Fig. 4.-, the ends of which act through openings in the compressing plate n, to burnish t-he pin as it rolls beneath said plate n, between that and the Wheel e.

It will now be apparent that by the rolling and compressing operation herein set forth, an iron pin can be made in as perfect and salable form as the brass pins, because the pins heretofore made either had not suflicient coating material to be protected from rust or else were rough and uneven on their A DE GRASSE FOWLER ANI) THADDEUS FOWLER, OF NORTH BRANFORD, CONNECTICUT,`

MALTBY, AND GUSTAVUS R. ELLIOTT, OF SAME surface; We ai enabled t lapply the neces- In 'Witness Whi'ef We have herento set sary amount of coating Ymaterial vnel then our signatures this fifteenth day of Decem- 10 bring the surface to e. perfect finish. ber 1859. Y What We claim and desire to secure by -DE GRASSE FOWLER. 5 vLetters Patent is Y THADDEUS FOWLER.

Finishing coated iron pins by the rolling Witnesses: Y 5 and compressing operation substantially as T. A. SMITH,

specied. C. D. MALTBY. 

